/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.antgroup.geaflow.common.schema;

import java.io.Serializable;
import java.util.List;

public interface ISchema extends Serializable {

    /**
     * Get schema id.
     *
     * @return schema id
     */
    int getSchemaId();

    /**
     * Get schema name.
     *
     * @return schema name
     */
    String getSchemaName();

    /**
     * Get a field of an index.
     *
     * @param index field index
     * @return field
     */
    Field getField(int index);

    /**
     * Get a field of a specified field name.
     *
     * @param fieldName field name
     * @return field
     */
    Field getField(String fieldName);

    /**
     * Get all fields.
     *
     * @return field array
     */
    List<Field> getFields();

}
